Uninterruptible power supply



FIG. 1 is a front right top perspective view of an power supply devicein accordance with the present invention.

FIG. 2 is a rear left bottom perspective view of the power supply deviceof FIG. 1.

FIG. 3 is a front elevation view of the power supply device of FIG. 1.

FIG. 4 is a rear elevation view of the power supply device of FIG. 1.

FIG. 5 is a left elevation view of the power supply device of FIG. 1,with the right elevation view being a mirror image thereof.

FIG. 6 is a top plan view of the power supply device of FIG. 1; and,

FIG. 7 is a bottom plan view of the power supply device of FIG. 1.

CLAIM The ornamental design for an power supply device, as shown anddescribed.